SIP’s cousin at a bank counter
Monthly deposit, declared RD rate, tenor in months. This uses a monthly compound annuity. Some banks compound RD quarterly; the difference is usually smaller than the “estimated” vs actual argument you already know from FDs.
Worked example: ₹5,000/month, 7%, 36 months
Contrib ₹1.8 lakh. Maturity a bit higher. If the passbook disagrees by a few hundred, day-count and quarterly compounding — not a conspiracy.
Questions
Are my numbers uploaded?
No. Arithmetic stays in this tab. Remember writes this browser only.
Can I share the inputs?
The URL hash (#) stores fields. Copy the address bar. Nothing is sent as a query string to a server of ours.
Is this a filing?
No. Print the worksheet. Argue with payroll or a CA. Do not paste this into an ITR as authority.